Oblique total transmissions through epsilon-near-zero metamaterials with hyperbolic dispersions
Wave-Functional Materials Lab, Department of Physics, Soochow University - Suzhou 215006, PRC
Received: 4 January 2013
Accepted: 31 January 2013
Zero-index metamaterials with near-zero permittivity and/or permeability usually reflect oblique incident waves due to total reflection that occurs at the air-metamaterial interface. In this work, we show that if one component of the near-zero–permittivity tensor of metamaterial turns from positive to negative due to a small disturbance, the dispersion surface changes dramatically from a tiny circle to a hyperbola, which enables oblique transmissions. A series of high-order total-transmission peaks at large incident angles is predicted and observed. These peaks are induced by Fabry-Pérot effects. Our work may have potential applications for filters, sensors and switches.
PACS: 41.20.Jb – Electromagnetic wave propagation; radiowave propagation / 42.25.Bs – Wave propagation, transmission and absorption / 78.20.-e – Optical properties of bulk materials and thin films
© EPLA, 2013